package com.tensquare.base.service;

import com.tensquare.base.dao.LabelDao;
import com.tensquare.base.pojo.Label;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.domain.Specification;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import util.IdWorker;

import javax.persistence.Parameter;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import java.util.ArrayList;
import java.util.List;

@Service
@Transactional
public class LabelService {

    @Autowired
    private LabelDao labelDao;

    @Autowired
    private IdWorker idWorker;

    public List<Label> findAll(){
        return labelDao.findAll();
    }

     public  Label findByid(String id){
        return labelDao.findById(id).get();
    }

    public  void insert(Label label){
        label.setId(idWorker.nextId()+"");
        labelDao.save(label);


    }
    public  void update(Label label){
        labelDao.save(label);
    }
    public void deleteByid(String id){
        labelDao.deleteById(id);
    }


    public List<Label> findSearch(Label label) {
       return labelDao.findAll(new Specification<Label>() {
           /**
            *
            * @param root
            * @param query
            * @param cb
            * @return
            */

            @Override
            public Predicate toPredicate(Root<Label> root, CriteriaQuery<?> query, CriteriaBuilder cb) {
                //new 一个集合来存储条件
                ArrayList<Object> list = new ArrayList<>();
                if (label.getLabelname()!=null && !"".equals(label.getLabelname())){
                    Predicate predicate = cb.like(root.get("labelname").as(String.class), "%" + label.getLabelname() + "%");//where like labelname %labelname%
                      list.add(predicate);
                }
                if (label.getState()!=null && !"".equals(label.getState())){
                    Predicate predicate = cb.equal(root.get("state").as(String.class), label.getState());//where labelname =labelname
                      list.add(predicate);
                }

                Predicate[] predicate = new Predicate[list.size()];
                predicate = list.toArray(predicate);
                return cb.and(predicate);
            }
        });
    }


    public Page<Label> pageQuery(Label label, int page, int size) {

        Pageable pageable= PageRequest.of(page-1,size);
        return  labelDao.findAll(new Specification<Label>() {
            /**
             *
             * @param root
             * @param query
             * @param cb
             * @return
             */

            @Override
            public Predicate toPredicate(Root<Label> root, CriteriaQuery<?> query, CriteriaBuilder cb) {
                //new 一个集合来存储条件
                ArrayList<Object> list = new ArrayList<>();
                if (label.getLabelname()!=null && !"".equals(label.getLabelname())){
                    Predicate predicate = cb.like(root.get("labelname").as(String.class), "%" + label.getLabelname() + "%");//where like labelname %labelname%
                    list.add(predicate);
                }
                if (label.getState()!=null && !"".equals(label.getState())){
                    Predicate predicate = cb.equal(root.get("state").as(String.class), label.getState());//where labelname =labelname
                    list.add(predicate);
                }

                Predicate[] predicate = new Predicate[list.size()];
                predicate = list.toArray(predicate);
                return cb.and(predicate);
            }
        },pageable);




    }
}
